title: Spectral narrowing and stabilization of thulium fiber lasers using guided-mode resonance filters.
abstract: We used guided-mode resonance filters (GMRFs), fabricated using thin-film deposition and chemical etching, as intracavity feedback elements to stabilize and narrow the output spectrum in thulium-doped fiber oscillators operating in the 2 μm wavelength regime, producing linewidths of <700 pm up to 10 W power levels. A Tm fiber-based amplified spontaneous emission source was used to characterize the reflective properties of the GMRFs. Linewidths of 500 pm and a 7.3 dB reduction in transmission were measured on resonances.
authors.affiliation: Townes Laser Institute, CREOL College of Optics and Photonics, University of Central Florida, Orlando, Florida 32816, USA. rasims@creol.ucf.edu
authors.forename: R Andrew
authors.initials: RA
authors.lastname: Sims
authors.forename: Zachary A
authors.initials: ZA
authors.lastname: Roth
authors.forename: Christina C C
authors.initials: CC
authors.lastname: Willis
authors.forename: Pankaj
authors.initials: P
authors.lastname: Kadwani
authors.forename: Timothy S
authors.initials: TS
authors.lastname: McComb
authors.forename: Lawrence
authors.initials: L
authors.lastname: Shah
authors.forename: Vikas
authors.initials: V
authors.lastname: Sudesh
authors.forename: Menelaos
authors.initials: M
authors.lastname: Poutous
authors.forename: Eric G
authors.initials: EG
authors.lastname: Johnson
authors.forename: Martin
authors.initials: M
authors.lastname: Richardson